The first story in this book, The Girl Who Leapt Through Time, only earned two stars for me. But the second one, The Stuff That Nightmares are Made Of, was a lot stronger and bumped up my rating to three stars. Both stories are mysterious (the second one much more so), and the author builds the suspense very well. I just thought the ending and the revelation of the whole time-traveling mystery in the titular story was too simplistic and lacked depth. The second story, though, impressed me with its blend of mystery, horror and everyday life. One interesting point is that both stories feature a teenage girl who has a boy/boys as close friends. It is not specified whether these stories are meant for a younger audience, but the young characters and the language in the translation somewhat implies that.